LOST ADMINISTRATOR PASSWORD AND PRIVLAGES

I don't have administrator permission for anything on my laptop, I can;t sign into the administrator acct, its gone, there is no adminstrator in the command prompt ,when that is clicked this is what comes up c:/users/(my name) . Do I need to reinstall windows ??? PLEASE HELP,,, THIS IS SO FRUSTRATING ,, i HAVE A HOTMAIL ACCT mICROSOFT BUT ADMIMISTRATOR ACCT NO I CAN'T GET TO ANYTHING,

I have a usb from Dell when i purchease the puter,, windows 10 but when I put it in nothing happens,, I went to the dell site and downloaded the recovery and repair and nothing happened,,, everything i tried it says need admin permission what the heck am i doing wrong,, I must say I am not computer savy ,,,,, : ( thank you for your quick response,, much appreciated

Boot up the laptop and once in the lock screen press and hold the power button to shut down. Try again. If the same repeat the process. See if it will then let you log in with your Microsoft email password.